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User: tsotha

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  1. Just a question of pushing down wages on What Intel's $300 Million Diversity Pledge Really Means · · Score: 1

    It means Intel is exploiting every opportunity to bring more people into the field and keep wages down. Apparently they didn't get enough H-1B people to do the trick.

  2. Re:Landing near populated areas? on SpaceX Signs Lease Agreement With Air Force For Landing Pad · · Score: 1

    Yeah, but coming down is inherently safer. The difference in the amount of damage it can do with and without fuel is quite large.

  3. Re:I concur on One Man's Quest To Rid Wikipedia of Exactly One Grammatical Mistake · · Score: 2

    It's a pet peeve of mine as well, but it's a small pet.

    I don't want it to affect my holy war on the criminal misuse of the apostrophe.

  4. Re:Yeah! on NASA Looking At Nuclear Thermal Rockets To Explore the Solar System · · Score: 1

    You're not going to get around the need for shielding. If you're going to be using enriched uranium you need to have something that will survive a launch failure, the same way RTGs do.

  5. Re:Yeah! on NASA Looking At Nuclear Thermal Rockets To Explore the Solar System · · Score: 1

    No, that's the mindset of someone who understands the rocket equation. TWR is important until you're almost in orbit.

  6. Re:Yeah! on NASA Looking At Nuclear Thermal Rockets To Explore the Solar System · · Score: 1

    Liquid Oxygen is HEAVY. A nuclear reactor would result in a weight REDUCTION.

    Nope. From the wiki page:

    Still, the lower thrust-to-weight ratio of nuclear thermal rockets versus chemical rockets (which have thrust-to-weight ratios of 70:1) and the large tanks necessary for liquid hydrogen storage mean that solid-core engines are best used in upper stages where vehicle velocity is already near orbital, in space "tugs" used to take payloads between gravity wells, or in launches from a lower gravity planet, moon or minor planet where the required thrust is lower.

    In other words they fill a spot between chemical rockets and ion engines. In the vast majority of cases they either don't have enough TWR and can't compete with chemical rockets or there's enough time to use far more efficient ion engines.

  7. Re:Yeah! on NASA Looking At Nuclear Thermal Rockets To Explore the Solar System · · Score: 1

    It's kind of silly to talk about "the overall gross lift-off mass" without talking about thrust. From the very same wiki page:

    Still, the lower thrust-to-weight ratio of nuclear thermal rockets versus chemical rockets (which have thrust-to-weight ratios of 70:1) and the large tanks necessary for liquid hydrogen storage mean that solid-core engines are best used in upper stages where vehicle velocity is already near orbital, in space "tugs" used to take payloads between gravity wells, or in launches from a lower gravity planet, moon or minor planet where the required thrust is lower.

    These things are not going to replace chemical rockets - they're too heavy.

  8. Re:Some potential, but hardly for a genuine leap on NASA Looking At Nuclear Thermal Rockets To Explore the Solar System · · Score: 1

    How is this any more than a revisiting of the ancient discredited NERVA/ROVER program which began in 1956 and dragged on to a miserable failed end in 1973?

    That's exactly what it is. I think most people here realize that.

    This shares the fundamental flaw of all rocket technology: the fact that any rocket has to carry and throw away a vast load of reaction mass. The Saturn V employed a total mass of 2970 tonnes to lift a mere 118 tonnes to LEO. But the actual raw energy needed to lift 118 tonnes to 200 km is E=mgh = 118,000 times 9.81 times 200,000 = 232 GJ, which is the quantity of energy contained in just 5.47 tonnes of gasoline. So the efficiency of the Saturn V was 0.184%, not because it was a "bad" rocket, but because it was a rocket.

    Well, until someone comes up with a workable theory for a reactionless drive, we're stuck with reaction mass. But that doesn't mean we're stuck with chemical rockets - if you could accelerate you reaction mass to some nontrivial fraction of the speed of light you wouldn't need very much of it.

  9. Re:About time on NASA Looking At Nuclear Thermal Rockets To Explore the Solar System · · Score: 3, Informative

    Ready for flight tests? Hrm. They could never get the core to stop cracking and expelling bits of enriched uranium out the back. That's not a small problem.

  10. Re:Yeah! on NASA Looking At Nuclear Thermal Rockets To Explore the Solar System · · Score: 2

    A very good chemical rocket will have an ISP of 450-460 seconds. A nuclear thermal rocket will have an ISP of around 900-1000, or roughly twice as "good".

    Nuclear thermal rockets will be heavy, though, and that detracts from their efficiency.

    I wonder if gas core nuclear rockets are so pie-in-the-sky nobody worked on them, or they're pie-in-the-sky because nobody worked on them. In theory you could get crazy ISP and thrust numbers from a gas core rocket.

  11. We've been launching plutonium into space for decades for RTGs. It's a small enough amount you can shield it such that it will survive a launch failure.

  12. Re:What are the practical results of this? on FCC Officially Approves Change In the Definition of Broadband · · Score: 1

    The return of the "look how backward the US is nobody has broadband" argument for subsidies.

  13. Re:All I know is... on Verizon About To End Construction of Its Fiber Network · · Score: 1

    You know, there may be a connection there.

  14. Re:It's unfortunate. on Barrett Brown, Formerly of Anonymous, Sentenced To 63 Months · · Score: 1

    Who prosecuted you - the feds or the state of New Jersey?

  15. Re:It's unfortunate. on Barrett Brown, Formerly of Anonymous, Sentenced To 63 Months · · Score: 1

    The FBI doesn't bring charges. That's the prosecutor's job. Didn't you ever watch Law & Order? With all the spinoffs in sindication it's on pretty much 24 hours a day.

    But what you're saying is true. 98% of prosecutions are pled out, and you know lots of those people are innocent. But the way the system is set up now they can throw 100 charges that all bring 3-5 years at you and all of the sudden you could be looking at 500 years in prison. Orrrrrr, you could take the plea and get three years.

    Objectively it's smart to take the plea, too. On average people who go to court get 20% longer sentences.

  16. Re:Be afraid on Barrett Brown, Formerly of Anonymous, Sentenced To 63 Months · · Score: 1

    Three felonies a day. We all do it. Congress has set up a situation such that if the feds really want you they can find things to charge you with. I don't have a lot of sympathy for this particular guy, but you're right.

  17. Re: There is no anonymity on Barrett Brown, Formerly of Anonymous, Sentenced To 63 Months · · Score: 1

    You are an unattractive girl, mid 20s, who has glowing stars on the ceiling of her bedroom and who goes to hot yoga class without realizing that yoga pants are not for everyone. You are lazy and significantly overestimate your intelligence.

    Mein Gott! I totally know her.

  18. Re:Slashdot stance on #gamergate on Doxing Victim Zoe Quinn Launches Online "Anti-harassment Task Force" · · Score: 1

    I should have said "people who actually played..."

  19. Re:Slashdot stance on #gamergate on Doxing Victim Zoe Quinn Launches Online "Anti-harassment Task Force" · · Score: 1

    This sounds about right to me. The only takeaway question I have from it though; is how does anyone give a shit about Zoe Quinn?

    Nobody does, really. The anger, I think, really comes from the fact that these people got caught with their pants down, and instead of offering a mea culpa and moving on they decided to attack their customers... and it worked, to a certain extent. I mean, look at the slashdot headline! They've been successful at creating the GG = misogyny meme by visiting 4chan and chumming for some crazy.

    I'm not sure how to read the larger picture except as another indication facts don't matter to SJWs, as if we needed more evidence.

  20. Re:Slashdot stance on #gamergate on Doxing Victim Zoe Quinn Launches Online "Anti-harassment Task Force" · · Score: -1, Flamebait

    Do all the reviewers in "the best presses in the United States" bang the same girl and give her pathetic game good reviews? This isn't about people "knowing each other", unless you're talking in the biblical sense.

    Let's recap here. Zoe Quinn slept with all the major game reviewers and/or their editors. She gets rave reviews for a game people who actually bought have panned mercilessly. Literally caught with their pants down, they point to their customers and scream "sexist!". That's the point of the scandal. You can dress it up however you like, but at the root it's about corruption in the gaming press.

  21. Re:Slashdot stance on #gamergate on Doxing Victim Zoe Quinn Launches Online "Anti-harassment Task Force" · · Score: 5, Insightful

    It's probably the most polite way to describe people who are, at their core, fucking fascists.

  22. Re:Slashdot stance on #gamergate on Doxing Victim Zoe Quinn Launches Online "Anti-harassment Task Force" · · Score: 2

    Yeah, this place is like a SJW commune sometimes. The GG stuff is laughable given the actual facts.

  23. Re:its a drug bust on US Government Lurked On Silk Road For Over a Year · · Score: 1

    That's a whole 'nother issue, one on which I agree with you. Sadly, the supreme court came down on the wrong side in Wickard, so things are the way they are.

  24. Re:its a drug bust on US Government Lurked On Silk Road For Over a Year · · Score: 1

    Meh. At this time illegal drugs are, well, illegal. The executive branch is not and should not be in the business of deciding which laws are stupid and which aren't. That's for Congress to decide. As long as what the Silk Road people were doing was illegal, the feds have a responsibility to arrest and prosecute them.

  25. Re:Mann: science by lawsuit on Michael Mann: Swiftboating Comes To Science · · Score: 1

    Yeah, and if you don't want your papers gone though, the last thing you want to do is sue someone. There's this legal thing called "discovery"...